A separable connector assembly includes a connecting member having a threaded end, and a hollow housing having a cylindrical wall that contains a body rotatably mounted therein. Each tab has a brush abutment edge that abuts or stops a shoulder of a tape or spine of a brush in the channel preventing removal from the holder when disposed in a brush engaging or retaining position. The ground plane may be adhesively coupled to a portion of the waveguide, and may be offset from the interior of the waveguide, so that adhesive squeezed out between the ground plane and the waveguide may be at least partially shielded from the waveguide, and thus does not significantly perturb electromagnetic signals within the waveguide.